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[McIDAS #EHH-480032]: LDM filtering

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  • Subject: [McIDAS #EHH-480032]: LDM filtering
  • Date: Tue, 30 Oct 2007 14:03:34 -0600
Hi Paul,

re:
> For now at least yes, the Alaska projection products are what I want to
> eliminate. There will be more once I figure out how to do it. If I
> create a regular expression for these grib2 files won't that be all I
> get? Is there a way to define a "NOT" regular expression. Of course I'll
> be the first to admit I'm an R.E. neophyte so it doesn't mean you can't
> do it, I just haven't seen it done anywhere.

The ~ldm/etc/ldmd.conf 'request' line syntax does not include the notion
of a 'not' (i.e., everything but, etc.).  Creation of a regular expression
that would request the full set of GRIB messages _except_ one or more would
likely be very cumbersome.  If the upstream LDM is running LDM-6.4+, then
you can filter the data that will be sent to the downstream pretty easily
as the 'allow' feature in LDM-6.4+ explicitly includes the 'not' syntax:

Please refer to the ldmd.conf webpage for details:

http://www.unidata.ucar.edu/software/ldm/ldm-6.6.5/basics/ldmd.conf.html

Cheers,

Tom
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Ticket Details
===================
Ticket ID: EHH-480032
Department: Support McIDAS
Priority: Normal
Status: Closed